Magnum 309044B Magnum XR Series Airless Sprayers Owner's manual
- Category
- Paint Sprayer
- Type
- Owner's manual
This manual is also suitable for
Form No. 309044
Rev. B
This manual contains service
instructions only. See manual
309043 for operating instructions.
MAGNUM XR9
Model 232750
MAGNUM XR7
Model 232745
MAGNUM XR5
Model 232740
9557A
9558A
9559A
Service Instructions
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
MAGNUM XR5, Model 232740, Series A
0.24 gpm (0.91 lpm) stand-mount sprayer, 25 ft (7.6 m) hose, and
SG1 spray gun with reversible spray tip and tip guard
2800 psi (19 MPa, 193 bar) Maximum Working Pressure
MAGNUM XR7, Model 232745, Series A
0.31 gpm (1.17 lpm) sprayer on heavy-duty cart, 50 ft (15.2 m) hose, and
SG2 metal spray gun with reversible spray tip and tip guard
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
MAGNUM XR9, Model 232750, Series A
0.38 gpm (1.44 lpm) sprayer on heavy-duty deluxe cart, 50 ft (15.2 m) hose, and
SG3 pro metal spray gun with reversible spray tip and tip guard
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
XR Series Airless Sprayers
t
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 2000, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
Parts
2 309044
Table of Contents
Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Identification and Function 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief Procedure 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grounding and Electrical Requirements 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Repair Information 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Troubleshooting 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Advanced Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Kits 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Diagnostics 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Board Diagnostics 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Board Kit 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Kit 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Service
Packing Module Kit 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Control Switch Kit 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inlet Valve Kit 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outlet Valve Kit 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Replacement Kit 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear/Yoke Kit 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spray–Prime/Drain Valve Kit 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts
Model 232740 XR5 Magnum Sprayer 30. . . . . . . . . . . . . . . . . . . . . . . . . .
Model 232745 XR7 Magnum Sprayer 32. . . . . . . . . . . . . . . . . . . . . . . . . .
Model 232750 XR9 Magnum Sprayer 34. . . . . . . . . . . . . . . . . . . . . . . . . .
Limited Warranty 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
309044 3
Warnings
STARTUP HAZARD AFTER THERMAL
OVERLOAD
The motor has a thermal overload switch
to shut down the motor if it overheats. To
reduce the risk of serious injury from the
motor restarting unexpectedly when it cools,
always turn the Power switch (B) OFF if the motor shuts
down.
PRESSURIZED EQUIPMENT HAZARD
M
AGNUM sprayers are capable of
producing up to 3000 psi (21 MPa, 207 bar)
maximum working pressure. To avoid
component rupture and injury, do not operate sprayer
with components rated less than pressure of sprayer.
This sprayer is equipped with a drain/prime valve that
automatically relieves overpressure in the event of a fault.
This automatic overpressure relief may cause splashing of
fluid. Correct the fault before you resume spraying.
NOTE: Inadequate flushing and/or dried paint in drain
system may prevent proper overpressure relief.
ELECTRIC SHOCK HAZARD
The spray gun, hose, and sprayer are
grounded through the electrical cord
of the sprayer.
To help prevent electric shock
D Use only grounded electrical outlets.
D Only use 3-wire extension cords.
D Make sure ground prongs are intact on sprayer and
extension cords.
D Keep electrical connections and inside of enclosures dry.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause
serious injury or death if splashed in the
eyes or on the skin, inhaled, or swallowed.
To help prevent injury or death from
toxic fluids
D Know specific hazards of fluid you are using; store
hazardous fluid in approved tub; dispose of hazardous
fluid according to all local, state, and national guidelines.
D Always wear protective eyewear, gloves, clothing, and
respirator as recommended by fluid and solvent
manufacturer.
EQUIPMENT MISUSE HAZARD
Do not use 1,1,1–trichloroethane, methylene
chloride, other halogenated hydrocarbon
solvents or fluids containing such solvents in
pressurized aluminum equipment such as
this sprayer and spray gun. Such use could
result in a chemical reaction, with the possibility of explosion.
WARNING
OFF
FLUID INJECTION HAZARD
If high-pressure fluid pierces your skin,
the injury might look like “just a cut,” but it
is a serious wound. Get immediate
medical attention.
To help prevent injection
D Always put gun trigger safety in SAFETY
ON position when not spraying.
D Always shut off power and relieve
pressure when you stop spraying and
before you service or clean sprayer,
remove parts, or repair leaks. See
Pressure Relief Procedure on page 6.
D Never allow children to use this equip-
ment.
D Keep clear of spray tip, and never point
spray gun at yourself or anyone else.
psi/MPa/bar
FIRE AND EXPLOSION HAZARD
A fire and explosion hazard exists any time
you spray or flush flammable fluids.
To help prevent fire or explosion when
spraying flammable fluids
D Be sure sprayer is adequately grounded
through electrical outlet by
– Using only grounded electrical outlets.
– Using only 3-wire extension cords.
– Making sure ground prongs are intact
on sprayer and extension cords.
D The motor in this sprayer is a source of
sparks. Keep sprayer in a well-ventilated
area, at least 20 feet (6 meters) away from
spray gun when spraying or flushing.
D Do not use plastic drop cloths when
spraying or flushing flammable fluids.
D Avoid all ignition sources such as static
electricity from plastic drop cloths, open
flames such as pilot lights, hot objects
such as cigarettes, and arcs from con-
necting or disconnecting power cords
and turning light switches off or on.
D Tape wall switches to prevent them from
being turned off or on.
D Do not smoke in spray area.
D Use only M
AGNUM or Graco airless paint hoses.
D Use outdoors or in a well-ventilated area.
WARNING
FLUID SPLASHBACK HAZARD
To avoid splashback of fluid while
spraying, make sure the spray gun is
assembled with the correct gasket for the
fluid being sprayed. See Operating
Instructions manual.
C
H
F
G
D
A
N
B
M
MAGNUM XR5
L
J
P
K
MAGNUM XR7
MAGNUM XR9
W
W
X
X
Y
E
W
OFF
ON
9558A
9559A
9560A
K
K
4 309044
Component Identification and Function
309044 5
Component Identification and Function
A Electric motor (inside of enclosures) Provides mechanical power to pump
B Power switch For manually turning on/off electrical power to motor (“I” is ON / “0” is OFF)
C Pressure Control knob For manually increasing (turn clockwise) and decreasing (turn
counter-clockwise) fluid pressure in pump, hose, and spray gun
D Pump fluid outlet fitting Threaded connection for paint hose
E InstaCleant fluid filter D Filters fluid coming out of pump to reduce tip plugging and improve finish
D Self cleans during pressure relief
F Power-Pistont pump (behind cover) Pumps and pressurizes fluid and delivers it to paint hose
G Suction tube Draws fluid from paint pail into pump
H Drain tube (with diffuser) Drains fluid in system during priming and pressure relief
J Spray–Prime/Drain valve control D Directs pressurized fluid to paint hose in SPRAY position (pointing forward)
D Directs fluid to drain tube in PRIME/DRAIN position (pointing down)
D Automatically relieves system pressure in overpressure situations
K Fluid inlet connection Where suction tube connects to pump
L Inlet screen Prevents debris from entering pump
M Paint hose For transporting high-pressure fluid from pump to spray gun
N Cord wrap bracket For stowing electrical cord (MAGNUM XR5 only)
P Airless spray gun Manually-controlled, hand-held on/off device for fluid being sprayed
Q Spray gun tip guard Reduces risk of fluid injection injury
R Spray gun reversible spray tip D Atomizes fluid being sprayed, forms spray pattern, and controls fluid flow
according to hole size
D Reverses for unplugging without disassembly
S Spray gun trigger safety lever Prevents accidental triggering of spray gun
T Spray gun fluid inlet fitting Threaded connection for paint hose
U Smooth Glidet swivel
(SG3 spray gun only)
Allows spray gun to swivel without twisting paint hose
V Spray gun fluid filter (in handle) Filters fluid entering spray gun to reduce tip plugging and improve finish
W Hose/Cord wrap bracket For stowing paint hose and electrical cord (MAGNUM XR7 and XR9 only)
X Pail hanger For transporting pail by its handle (MAGNUM XR7 and XR9 only)
Y Power Flush attachment (included) For hooking up garden hose to suction tube for power flushing water-base
fluids
SG1 Spray Gun
included with
M
AGNUM XR5
Q
R
S
T
V
SG2 Spray Gun
included with
M
AGNUM XR7
Q
R
S
SG3 Spray Gun
included with
M
AGNUM XR9
Q
R
S
U
T
T
V
9561A
9562A
6 309044
Pressure Relief
Procedure
WARNING
To help prevent injection injuries, follow
this procedure when you stop spraying
and before you service or clean the
sprayer, remove parts, or repair leaks.
psi/MPa/bar
1. Turn Power switch (B) to OFF, and unplug sprayer.
OFF
B
9565A
2. Turn Spray–Prime/Drain valve (J) to PRIME/
DRAIN to relieve pressure. Trigger gun to relieve
pressure that might be in hose.
J
9565A
3. Put trigger safety (S) in SAFETY ON position.
SG2 / SG3
SG1
S
S
NOTE: Leave Spray–Prime/Drain
valve in the PRIME/DRAIN position
until you are ready to spray again.
9565A
If you suspect that the spray tip or hose is completely
clogged or that pressure has not been fully relieved
after following the steps above, VERY SLOWLY loos-
en the tip guard retaining nut or hose end coupling to
relieve pressure gradually. Then loosen it completely.
Then clear the tip or hose obstruction.
Grounding and
Electrical Requirements
WARNING
This sprayer requires a 120V AC, 60 Hz, 15
A
circuit with a grounding receptacle. Never us
e
an outlet that is not grounded. Do not use th
e
sprayer if the electrical cord has a damaged ground
prong. Use only an extension cord with an
undamaged, 3-prong plug.
Recommended extension cords for use with this
sprayer are
D 25 ft (7.6 m) 18 AWG
D 50 ft (15.2 m) 16 AWG
D 100 ft (30.5 m) 14 AWG
D 150 ft (45.7 m) 12 AWG
NOTE: Smaller-gauge or longer extension cords may
reduce sprayer performance.
309044 7
General Repair Information
WARNING
HOT SURFACES HAZARD
EXPLOSION HAZARD
Motor and drive housing may be very hot
during operation and could burn skin if
touched.
Flammable materials spilled on hot, bare
motor could cause fire or explosion.
Have enclosures in place during
operation to reduce risk of burns, fire, or
explosion.
D Keep all screws, nuts, washers, gaskets, and
electrical fittings that you remove during repair
procedures. These parts are not normally provided
with replacement assemblies.
D Test repairs after problems are corrected.
D If the sprayer does not operate properly, review
the repair procedure to verify that you did it cor-
rectly. See Troubleshooting on page 8 and
Advanced Troubleshooting on page 10.
D Overspray may build up in the air passages.
Remove any overspray and residue from the air
passages and openings in the enclosures whenever
you service the sprayer.
Do not operate the sprayer without the enclosure,
and replace if damaged. Enclosures direct cooling air
around the motor to prevent overheating. They also
reduce the risk of burns, fire or explosion. Read the
following WARNING.
WARNING
ELECTRIC SHOCK HAZARD
MOVING PARTS HAZARD
To reduce risk of serious injury, including
electric shock, do not touch moving or
electrical parts with fingers or tools while
testing repair. Unplug sprayer when power
is not required for testing. Install all
covers, gaskets, screws, and washers
before you operate sprayer.
CAUTION
Do not run sprayer dry for more than 30 seconds.
Doing so could damage pump packings.
Protect the internal drive parts of this sprayer
from water. Openings in the enclosures allow for air
cooling of the mechanical parts and electronics
inside. If water gets into these openings, the sprayer
could malfunction or be permanently damaged.
Prevent pump corrosion and damage from freez-
ing. Never leave water or water-base paint in
the sprayer when it is not in use in cold weather.
Freezing fluids can seriously damage the sprayer.
Store the sprayer with mineral spirits/paint thinner or
Graco Pump Armor to protect equipment during
storage.
8 309044
Basic Troubleshooting
The following troubleshooting guidelines from the Operating Instructions manual are included here as preemptive
measures against Advanced Troubleshooting on page 10.
PROBLEM CAUSE SOLUTION
Power switch is on and
sprayer is plugged in, but
motor does not run and pump
Pressure is set at zero
pressure.
Turn Pressure Control knob (C) clockwise to increase
pressure setting.
motor does not run, and pump
does
n
ot
cyc
l
e
.
Motor or control is damaged. See Motor Does Not Operate on page 10.
does
not
cycle
.
Electrical outlet is not
providing power.
D Try a different outlet, or plug in something that you know is
working to test outlet.
D Reset building circuit breaker, or replace fuse.
Extension cord is damaged. Replace extension cord. See Grounding and Electrical
Requirements on page 6.
Sprayer electrical cord is
damaged.
Check for broken insulation or wires. Replace electrical cord if
damaged.
Paint is frozen or hardened in
pump.
See Motor Does Not Operate on page 10.
Pump does not prime. Spray–Prime/Drain valve is in
SPRAY position.
Turn Spray–Prime/Drain valve (J) to PRIME/DRAIN position
(pointing down).
Inlet screen is clogged, or
suction tube is not immersed.
Clean debris off inlet screen (L), and make sure suction tube
(G) is at bottom of paint pail.
Balls in check valve are stuck,
or check valves are damaged.
Clean or replace check valves. See Pump Service on page
23.
Suction tube is leaking. Tighten suction tube connection (K). Inspect for other cracks
or vacuum leaks.
Spray gun stopped spraying. Spray tip is plugged. Unplug spray tip.
Pump cycles but does not
b ild
Pump is not primed. Prime pump.
y
build up pressure.
Inlet screen is clogged, or
suction tube is not immersed.
Clean debris off inlet screen (L), and make sure suction tube
(G) is at bottom of paint pail.
Paint pail is empty. Refill paint pail, and reprime sprayer.
Suction tube is leaking. Tighten suction tube connection (K). Inspect for other cracks
or vacuum leaks.
Pump check valves are dirty
or damaged.
Clean or replace check valves. See Pump Service on page
23.
Spray–Prime/Drain valve is
worn or obstructed with debris
Check Spray–Prime/Drain valve for debris trapped on seat
and worn parts. Torque to 185 in-lb (21 NSm). Replace if parts
are worn.
See Spray–Prime/Drain Valve Kit on page 28.
Pump cycles, but paint only
dribbles or spurts when spray
gun is triggered
Pressure is set too low. Slowly turn Pressure Control knob (C) clockwise to Increase
pressure setting to check if sprayer develops more pressure.
gun is triggered.
Spray tip is plugged. Unplug spray tip.
InstaClean fluid filter is
clogged.
Clean or replace InstaClean fluid filter (E).
Spray gun fluid filter is
clogged.
Clean or replace spray gun fluid filter (V).
Spray pattern is inconsistent
or is leaving stripes.
Pressure is set too low. Turn Pressure Control knob (C) clockwise to increase
pressure.
Spray tip is worn beyond
capability of sprayer.
Replace spray tip.
309044 9
Basic Troubleshooting
PROBLEM CAUSE SOLUTION
Pressure is set at maximum,
but cannot achieve a good
tt
Spray tip is too big for
sprayer.
Select a smaller spray tip.
g
spray pattern.
Spray tip is worn beyond
capability of sprayer.
Replace spray tip.
Extension cord is too long or
not a heavy enough gauge.
Replace extension cord. See Grounding and Electrical
Requirements on page 6.
Spray gun fluid filter is
clogged.
Clean or replace spray gun fluid filter (V).
InstaClean fluid filter is
clogged.
Clean or replace InstaClean fluid filter (E).
Inlet screen is clogged. Clean debris off inlet screen (L).
Pump valves are worn. See Output is Low or Fluctuating on page 13.
Motor is hot and runs
intermittently
Vent holes in enclosures are
p
lugged or s
p
rayer is
Keep vent holes clear of obstructions and overspray, and keep
s
p
rayer o
p
en to air
intermittentl
y.
NOTE: This is a thermal
p
l
ugge
d
, or sprayer
i
s
covered.
sprayer open
t
o a
i
r.
NOTE:
This
is
a
thermal
overload condition. Motor
automatically shuts off due to
excessive heat
Extension cord is too long or
not a heavy enough gauge.
Replace extension cord. See Grounding and Electrical
Requirements on page 6.
excess
i
ve
h
ea
t
.
See Startup Hazard After
Thermal Overload on
p
age 3 Damage can occur if
Unregulated electrical
generator being used has
excessive voltage.
Use electrical generator with a proper voltage regulator.
Sprayer requires a 120V AC, 60 Hz, 1500-Watt generator.
page
3
.
Damage
can
occur
if
cause is not corrected.
Sprayer was operated at high
pressure with very small tip,
which causes frequent motor
starts and excessive heat
build up.
Decrease pressure setting or increase tip size.
Building circuit breaker opens
after sprayer operates for 5 to
10 minutes.
OR
Too many appliances are
plugged in on same circuit.
Free up circuit (unplug things), or use a less busy circuit.
OR
Building circuit breaker opens
as soon as sprayer is plugged
into outlet, and sprayer is
turned on.
Sprayer electrical cord is
damaged.
Check for broken insulation or wires. Replace electrical cord if
damaged.
Fan pattern varies
dramatically while spraying
OR
Sprayer does not turn on
promptly when resuming
spraying.
Pressure control switch is
worn and causing excessive
pressure variation.
See Pressure Control Switch Kit on page 22.
Cannot trigger spray gun. Spray gun trigger safety lever
is in SAFETY ON position.
Rotate trigger safety lever (S) to SAFETY OFF position.
Spray comes out of spray gun
in two thick streams.
Reversible spray tip is in
UNPLUG position.
Rotate arrow-shaped handle on spray tip so it points forward in
SPRAY position.
Paint is coming out of
pressure control switch.
Pressure control switch is
worn.
See Pressure Control Switch Kit on page 22.
Spray–Prime/Drain valve
actuates automatically,
relieving pressure through
drain tube.
System is overpressurizing. See Excessive Pressure is Building Up on page 15.
Paint leaks down outside of
pump.
Pump packings are worn. Replace pump packings. See Pump Service on page 20.
10 309044
Advanced Troubleshooting
See Electric Shock Hazard on
page 7.
See Pressure Relief
Procedure on page 6.
NOTE: See Basic Troubleshooting on page 8 for the problems that are more easily remedied.
General Problem: Motor Does Not Operate
SPECIFIC PROBLEM CAUSE SOLUTION
Power switch is on and
s
p
rayer is
p
lugged in but
See Basic Troubleshooting page 8.
sprayer
i
s p
l
ugge
d
i
n,
b
u
t
pump does not cycle.
Basic Mechanical
Problems
Paint is frozen or hardened in pump. Unplug sprayer from electrical outlet.
NOTE: If frozen, do not try to start sprayer
until completely thawed, or damage to motor,
control board, and/or drivetrain may occur.
Make sure power switch (B) is OFF. Place
sprayer in warm area for several hours, then
plug in and turn on. Slowly increase pressure
setting to see if motor starts.
If paint hardened in sprayer, replace pump
packings and remove all residue from valves.
See Pump Service on page 20.
Motor is damaged. Remove gear, and try to rotate motor shaft by
hand. See Motor Diagnostics on page 16.
Replace motor if shaft will not turn.
See Motor Kit on page 18.
Yoke is broken, because pump is locked up by
dried paint or worn packings.
Repair as necessary.
See Gear/Yoke Kit on page 27.
Basic Electrical Problems Motor is overheated. Allow to cool for 30 minutes. Retry.
Electrical outlet is damaged. Reset building circuit breaker or replace
building fuse. Try another outlet.
Check electric supply with volt meter. Meter
must read 85 to 130V AC. If voltage is too
high, do not plug sprayer in until outlet is
corrected.
Control board leads are improperly fastened or
improperly mated.
Replace any loose terminals. Make sure all
leads and harnesses are firmly connected.
Check pressure control harness connection on
front side of drive housing.
Clean control board terminals. Securely
reconnect leads.
Motor brushes are worn.
NOTE: Brushes do not wear at the same rate on
both sides of motor. Check both brushes.
Check length of brushes. Brush length must
be 0.25 in. (6.4 mm) minimum. Replace motor
if brushes are worn.
See Motor Kit on page 18.
Motor armature commutator is damaged. Check for burn spots, gouges and extreme
roughness. Have motor shop resurface
commutator if possible, or replace motor.
See Motor Kit on page 18.
309044 11
Advanced Troubleshooting
General Problem: Motor Does Not Operate (continued)
SPECIFIC PROBLEM CAUSE SOLUTION
Basic Electrical Problems
(Continued)
Motor armature is shorting. Check for shorts using armature tester (growler), or perform
spin test (see Motor Diagnostics on page 16). Replace
motor if shorts are evident.
See Motor Kit on page 18.
Control board is damaged.
CAUTION: Do not perform control
board diagnostics until you have
determined that the armature is good.
A bad motor armature can burn out a
good control board.
See Control Board Diagnostics on page 16, and replace
control board if damaged.
See Control Board Kit on page 17.
Sprayer Wiring Problems
NOTE: Remove right
enclosure mounting
screws, and pull right
enclosure away from drive
housing. Take care to not
pull on the leads from
the electrical cord and
the Power switch (B).
Sprayer electrical cord is damaged. Unplug sprayer electrical cord. Disconnect black electrical
cord wire at Power switch (B), and unplug in-line connection
of white electrical cord wire. Plug in electrical cord, and test
voltage between black and white electrical cord wires.
Meter must read 85 to130V AC.
Replace electrical cord if no voltage.
Sprayer power switch (B) is damaged. Unplug sprayer electrical cord. Disconnect black control
board wire at Power switch (B), and unplug in-line
connection of white electrical cord wire. Plug in electrical
cord, turn Power switch ON, and test voltage between open
terminal of Power switch and white electrical cord wire.
Meter must read 85 to130V AC.
Replace Power switch (B) if no voltage.
Thermal overload cutoff switch is
damaged.
See Startup Hazard After Thermal
Overload on page 3.
Unplug sprayer electrical cord. Remove motor harness from
control card, and check for continuity between yellow leads
of motor harness. If thermal relief switch is open (no
continuity), allow motor to cool. If switch remains open after
motor cools, replace motor (see Motor Kit on page 18).
If thermal relief switch closes after motor cools, find and
correct cause of overheating.
Terminals are damaged or loose. Replace any damaged terminals, and make sure all
terminal connections are tight.
12 309044
Advanced Troubleshooting
General Problem: Circuit Breaker is Tripping
SPECIFIC PROBLEM CAUSE SOLUTION
Building circuit breaker opens
as soon as sprayer is turned on.
Sprayer electrical wiring is pinched, or insulation
is damaged.
Wires between pressure control switch and
control board are pinched.
Repair or replace any damaged wiring or
terminals. Securely reconnect all wires.
Motor armature is shorting. Check for shorts using armature tester
(growler), or perform spin test (see Motor
Diagnostics on page 16). Replace motor if
shorts are evident.
See Motor Kit on page 18.
Control board is damaged.
CAUTION: Do not perform control board
diagnostics until you have determined that the
armature is good. A bad motor armature can burn
out a good control board.
See Control Board Diagnostics on page
16, and replace control board if damaged.
See Control Board Kit on page 17.
Building circuit breaker opens
as soon as sprayer is plugged
into outlet, and sprayer is NOT
turned on.
NOTE: Remove right
enclosure mounting screws,
and pull right enclosure away
from drive housing. Take care
t t ll th l d f
Sprayer electrical cord is damaged. Unplug sprayer electrical cord. Disconnect
black electrical cord wire at Power switch (B),
and unplug in-line connection of white
electrical cord wire. Plug in electrical cord,
and test voltage between black and white
electrical cord wires. Meter must read
85 to130V AC.
Replace electrical cord if no voltage.
g
to not pull on the leads from
the electrical cord and the
Power switch (B).
Sprayer Power switch (B) is damaged. Unplug sprayer electrical cord, and
disconnect wires from Power switch (B).
Check resistance of switch with ohmmeter.
Reading must be infinity with Power switch
OFF, and zero with Power switch ON.
Replace Power switch if damaged.
See also “Basic Electrical Problems” on page 10 and “Sprayer Wiring Problems” on page 11.
General Problem: Motor Operation is Erratic
SPECIFIC PROBLEM CAUSE SOLUTION
Sprayer quits after running for 5 to 10 minutes. Electrical outlet is damaged or
supplying the wrong voltage.
Reset building circuit breaker or
replace building fuse. Try another
outlet.
Check electric su
pp
ly with volt meter
Check electric supply with volt meter.
Meter must read 85 to 130V AC. If
voltage is too high, do not use outlet
until corrected.
See also “Basic Electrical Problems” on page 10 and “Sprayer Wiring
Problems” on page 11.
Motor is hot and runs intermittently.
NOTE: This is a thermal overload condition.
Motor automatically shuts off due to excessive
heat.
See Startup Hazard After Thermal Overload
on page 3. Damage can occur if cause is not
corrected.
See Basic Troubleshooting page 9.
309044 13
Advanced Troubleshooting
General Problem: Output is Low or Fluctuating
SPECIFIC PROBLEM CAUSE SOLUTION
Pump cycles, but output is low
or surging.
See Basic Troubleshooting page 8.
Pump valves are worn. Check for worn pump valves as follows:
Prime sprayer with paint. Trigger spray gun
momentarily. When spray gun trigger is
released, pump should cycle momentarily
and stop. If pump continues to cycle, pump
valves may be worn.
See Pump Service on page 23.
Spray–Prime/Drain valve is leaking. Check Spray–Prime/Drain valve for debris
trapped on seat and for worn parts. Torque to
185 in-lb (21 NSm). Replace if parts are worn.
See Spray–Prime/Drain Valve Kit on
page 28.
Voltage from electrical outlet is too low. Low
voltages reduce sprayer performance.
Check voltage of outlet. Meter must read
85 to 130V AC.
Reset building circuit breaker or replace
building fuse.
Repair electrical outlet or try another outlet.
Extension cord is too long or not a heavy enough
gauge.
Replace extension cord.
See Grounding and Electrical
Requirements on page 6.
Leads from motor to control board are damaged,
loose, or overheated.
Be sure terminals are centered and firmly
connected. Inspect wiring insulation and
terminals for signs of overheating, and
replace any loose terminals or damaged
wiring. Securely reconnect terminals.
Motor brushes are worn.
NOTE: Brushes do not wear at the same rate on
both sides of motor. Check both brushes.
Check length of brushes. Brush length must
be 0.25 in. (6.4 mm) minimum. Replace
motor if brushes are worn.
See Motor Kit on page 18.
Motor brush springs are broken. Replace motor if springs are broken.
See Motor Kit on page 18.
Motor brushes are binding in brush holders. Clean brush holders, remove carbon dust
with small cleaning brush.
Motor stops before sprayer reaches correct
pressure (stall pressure is too low).
Replace pressure control switch.
See Pressure Control Switch Kit on
page 22.
Motor armature is shorting. Check for shorts using armature tester
(growler), or perform spin test (see Motor
Diagnostics on page 16). Replace motor if
shorts are evident.
See Motor Kit on page 18.
Control board is damaged.
CAUTION: Do not perform control board
diagnostics until you have determined that the
armature is good. A bad motor armature can burn
out a good control board.
See Control Board Diagnostics on page
16, and replace control board if damaged.
See Control Board Kit on page 17.
14 309044
Advanced Troubleshooting
General Problem: Output is Low or Fluctuating (continued)
SPECIFIC PROBLEM CAUSE SOLUTION
Motor runs and pump
cycles, but pressure does
not build up.
Intake valve ball or outlet valve ball is not
seating properly.
Remove and clean valves, and check balls and
seats for nicks; replace if necessary. Strain paint
before spraying to remove particles that could clog
pump.
See Pump Service on page 23.
Pump packings are worn or damaged. Check for leaking around throat packing nut.
Replace pump packings if there are leaks.
See Pump Service on page 20.
Spray–Prime/Drain valve is leaking. Check Spray–Prime/Drain valve for debris trapped
on seat and for worn parts. Torque to 185 in-lb
(21 NSm). Replace if parts are worn.
See Spray–Prime/Drain Valve Kit on page 28.
Spray pattern has
variations, or pressure
fluctuates excessively.
Leads from motor to control board are
damaged, loose, or overheated.
Be sure terminals are centered and firmly
connected. Inspect wiring insulation and terminals
for signs of overheating, and replace any loose
terminals or damaged wiring. Securely reconnect
terminals.
Pressure control switch leads are pinched
between pump and drive housing or between
front cover and drive housing.
Make sure pressure control harness is routed
behind pump, through retention clip, and
connected to control board connector at back of
drive housing (connected with tab to the right).
Control board is damaged.
CAUTION: Do not perform control board
diagnostics until you have determined that the
armature is good. A bad motor armature can
burn out a good control board.
See Control Board Diagnostics on page 16, and
replace control board if damaged.
See Control Board Kit on page 17.
Pressure control switch is damaged. Replace pressure control switch.
See Pressure Control Switch Kit on page 22.
General Problem: There is No Output
SPECIFIC PROBLEM CAUSE SOLUTION
Power switch is on and
s
p
rayer is
p
lugged in but
See Basic Troubleshooting page 8.
sprayer
i
s p
l
ugge
d
i
n,
b
u
t
pump does not cycle.
Motor runs, but pump does not
cycle.
Gear and/or yoke are damaged. Replace gear and yoke.
See Gear/Yoke Kit on page 27.
Motor does not run. Water or paint entered pressure control
switch or shorted control board.
Clean out and/or dry out, and retry. Replace if
necessary. See Pressure Control Switch Kit on
page 22.
309044 15
Advanced Troubleshooting
General Problem: Excessive Pressure is Building Up
SPECIFIC PROBLEM CAUSE SOLUTION
Spray–Prime/Drain valve
actuates automatically,
relieving
p
ressure
Pressure control switch is worn. Replace pressure control switch.
See Pressure Control Switch Kit on page 22.
relie
v
ing
press
u
re
through drain tube.
Water or paint entered pressure control switch
or shorted control board.
Clean out and/or dry out, and retry. Replace if
necessary. See Pressure Control Switch Kit on
page 22.
Control board has failed. See Control Board Diagnostics on page 16, and
replace control board if damaged.
See Control Board Kit on page 17.
List of Kits
Kit Number Kit Description
235014 Spray–Prime/Drain Valve
243082 Inlet Strainer (for inlet of suction tube)
243090 XR Pump Repair (pump packing module)
243093 XR Pump Inlet Valve Module
243094 XR Pump Outlet Valve Module
243095 Pump Rod
243096 Drain Tube Diffuser
243227 XR5 Pressure Control Switch
243521 XR7/XR9 Pressure Control Switch
243228 XR5/XR7 Control Board
243229 XR9 Control Board
243231 Fan/Shroud/Brace
243230 Gear/Yoke/Guides
243232 XR5 Enclosure (includes both sides, labels, and screws)
243234 XR7/XR9 Enclosure (includes both sides, labels, and screws)
243236 XR Motor/Drive Housing
243237 Front Cover/Bearing
243533 XR Pump Replacement (complete pump*)
* Does not include XR5 Pressure Control Switch 243227 or XR7/XR9 Pressure
Control Switch 243521. Re-use pressure control switch from pump being
replaced, or order separately.
16 309044
Motor Diagnostics
See Service Drawing on page 18.
Check for electrical continuity in the motor armature, windings, and brush as follows:
See Electric Shock Hazard on
page 7.
See Pressure Relief
Procedure
on page 6.
Setup
1. Unplug electrical cord, and relieve pressure.
2. Remove right enclosure, and disconnect motor
harness from control board.
3. Remove fan brace.
4. Remove the four cover screws and front cover.
5. Remove yoke and guide rods, and remove gear.
Armature Short Circuit Test (Spin Test)
Quickly turn motor fan by hand. If there are no electri-
cal shorts, fan coasts two or three revolutions before
stopping. If fan does not spin freely, armature is
shorted. Replace motor. See Motor Kit on page 18.
Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
1. Connect red and black motor leads together with
test lead. Turn motor fan by hand at about two
revolutions per second.
2. If there is uneven resistance or no resistance,
replace motor. See Motor Kit on page 18.
Control Board Diagnostics
See Service Drawing on page 18.
Check for a damaged control board or pressure control switch as follows:
See Electric Shock Hazard on
page 7.
See Pressure Relief
Procedure
on page 6.
1. Unplug electrical cord, and relieve pressure.
2. Remove the four cover screws and front cover.
3. Remove yoke and guide rods, and remove gear.
4. Remove pressure control harness from control
board. Using fingernail or tip of small, flat-
blade screwdriver, press tab on right side
connector to release.
5. Attach to the control board a harness from a
pressure switch that you know is functioning
correctly.
NOTE: Pressure control switch does not have to
be installed in pump.
6. Turn pressure control adjustment knob one turn
clockwise (increase pressure setting).
7. Plug electrical cord into 120V AC receptacle, and
turn Power switch (B) ON.
D If motor runs, replace pressure switch.
D If motor does not run, replace control board
and repeat test. See Control Board Kit on
page 17.
XR9 control
board shown
mounting
screw
9699A
309044 17
Control Board Kit
XR5/XR7 Control Board Replacement Kit 243228
XR9 Control Board Replacement Kit 243229
If Control Board Diagnostics (page 16) indicate a
damaged control board, replace the control board as
follows:
See Electric Shock Hazard on
page 7.
See Pressure Relief
Procedure on page 6.
Disassembly
See Service Drawing on page 18.
1. Unplug electrical cord, and relieve pressure.
2. Remove right enclosure mounting screws, and pull
right enclosure away from drive housing. Take
care to not pull on the leads from the electrical
cord and the Power switch (B).
3. Disconnect motor harness and electrical cord and
Power switch leads from control board.
4. Remove screw that mounts control board, and pull
control board 2 in. (50 mm) back from drive hous-
ing.
5. Disconnect pressure control harness from control
board connector. Using fingernail or tip of small,
flat-blade screwdriver, press tab on right side
of connector to release.
Installation
1. Connect pressure control harness to new control
board connector.
2. Install new control board on drive housing, and
tighten control board mounting screw.
3. Connect electrical cord and Power switch leads
and motor harness to control board.
4. Replace right enclosure, and tighten enclosure
mounting screws.
18 309044
Control Board Detail
Motor Kit
XR Motor/Drive Housing Replacement Kit 243236
motor
fan
fan shield
shaft bushing
fan
brace
Rod/Yoke Detail
cover
screw
front cover
2
yoke 3
guide rods
4 5
pressure
control
harness
1
drive housing
gear
gear shaft 5
pump
pump mounting pin
5
left
enclosure
right
enclosure
motor
harness
control
board
plastic washer
1
2
3
Take care to not pinch harness between pump and any part of drive housing or between front cover and drive housing.
For best cover alignment, tighten lower two cover screws first, then top two. Torque screws to 70 to 80 in-lb (8 to 9 NSm).
Installation Notes
For yoke installation, eccentric bearing on gear must touch top of pump rod. Turn gear to move eccentric bearing
to proper height.
4
5
If yoke guide rods drop out of position during assembly, damage will occur when cover is tightened. Always check position
of guide rods before tightening cover.
Apply light coat of grease.
drive housing
mounting
screw
Drive Train Detail
6
6 Orient tab and “TOP” to top of fan shield.
9700A
tab
To prevent misalignment, assemble sprayer tipped onto back of enclosure.
o-rings
309044 19
Motor Kit
XR Motor/Drive Housing Replacement Kit 243236
If Motor Diagnostics (page 16) reveal a damaged motor, or if either of the motor brushes are shorter than 1/4 in.
(6.4 mm), or if the motor shaft cannot turn, replace the motor as follows:
Disassembly
See Electric Shock Hazard on
page 7.
See Pressure Relief
Procedure on page 6.
1. Unplug electrical cord, and relieve pressure.
2. Remove the four cover screws and front cover.
3. Remove yoke and guide rods.
4. Disconnect pressure control harness from control
board connector at back of drive housing. Using
fingernail or tip of small, flat-blade screwdriv-
er, press tab on right side of connector to
release.
5. Remove pump and the two mounting pins from
drive housing.
6. Remove gear.
7. Remove enclosure mounting screws from both
side enclosures. Fully remove left enclosure from
sprayer. Pull right enclosure away from drive
housing. Take care to not pull on the leads from
the electrical cord and the Power switch (B).
8. Disconnect motor harness from back of control
board.
9. Remove screw that mounts control board, and
remove control board from drive housing.
10. Carefully pull 3-legged fan brace from pegs on fan
shield. Use rag or glove to protect your fingers,
and pull fan off motor shaft.
11. Pull fan shield from motor. Note how the motor
leads are routed through the arches and slots
of the fan shield.
12. Remove stand (XR5) or cart (XR7 or XR9) legs
from drive housing.
Installation
D Read all Installation Notes in service drawing on
facing page.
D To prevent misalignment, assemble sprayer tipped
onto back of enclosure.
1. Install stand (XR5) or cart (XR7 or XR9) legs on
new drive housing.
2. Carefully route the motor leads as you observed
them in Step 11 of Disassembly (yellow wires
above black wire).
3. Install new fan shield on new motor. Orient tab
and “TOP” to top of fan shield.
4. Install new fan on motor shaft.
5. Install shaft bushing on new motor shaft, and
install new 3-legged fan brace in pegs on fan
shield.
6. Install control board on new drive housing, and
tighten control board mounting screw. See Control
Board Detail on facing page.
7. Plug new motor harness into back of control board.
8. Reinstall enclosures on sprayer, and install and
tighten enclosure mounting screws.
9. Install gear in new drive housing so teeth engage
with drive pinion of motor.
10. Route pressure control harness behind pump
through retention clip, and connect to control board
connector at back of drive housing (connect with
tab to the right).
11. Install pump on mounting pins. Make sure the
plastic washers are between the drive housing
and the pump.
12. Install yoke with rod cap in slot of yoke, as shown
in Rod/Yoke Detail on facing page.
13. Check final assembly against Drive Train Detail
on facing page.
14. Install front cover and cover screws.
20 309044
cover
screw
packing nut
E-clip
front cover
yoke
pump
pressure
control
harness
packing
spring
pump
rod
o-ring
pump
mounting
pins
drive housing
plastic washers
1
2
3
Take care to not pinch harness between pump and any part of drive housing or between front cover and drive housing.
1
2
For best cover alignment, tighten lower two cover screws first, then top two. Torque screws to 70 to 80 in-lb (8 to 9 NSm).
3
Installation Notes
gear shaft
For yoke installation, eccentric bearing on gear must touch top of pump rod. Turn gear to move eccentric bearing
to proper height.
guide rods
4
5
If yoke guide rods drop out of position during assembly, damage will occur when cover is tightened. Always check
position of guide rods before tightening cover.
4
Apply light coat of grease.
5
eccentric
bearing
5
5
5
5
5
Pump Service
XR Pump Repair Kit 243090 (Packing Module)
6 Torque to 120 to 150 in-lb (14 to 17 NSm).
6
Drive Train Detail
HINT: A pump with slight leakage at the rod packings can be temporarily tightened
(to finish the current paint job) without removing the pump as follows:
1. Loosen the packing nut enough to permit removal of the E-clip.
2. Tighten the packing nut all the way down into the pump for a short-term increase
in the sealing effect of the rod packings.
3. Repack the pump (XR Pump Repair Kit 243090) as soon as possible, because
paint leakage can get onto the gear and shorten its life.
XR5 Pressure Control Switch Replacement Kit 243227
XR7/XR9 Pressure Control Switch Replacement Kit 243521
7
7
Apply one or two drops of thread locking adhesive (included in Kits 243227 and 243521) to threads of pressure control
switch. Tor
q
ue to 180 to 210 in-lb
(
20 to 24 NSm
)
.
9701A
To prevent misalignment, assemble sprayer tipped onto back of enclosure.
Rod/Yoke Detail
o-rings
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Magnum 309044B Magnum XR Series Airless Sprayers Owner's manual
- Category
- Paint Sprayer
- Type
- Owner's manual
- This manual is also suitable for
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